Raker for grates



(N0 Model.)

B. D. MERRIGK. BAKER FOR GRATBS. No. 247,264; Patented Sept. 20,1881.

UNITED STATES PATENT OFFICE.

EDWARD D. MERRIGK, OF NEW BRIGHTON, PENNSYLVANIA.

RAKER FOR G RATES.

SPECIFICATION formingpart of Letters Patent No. 247,264, dated September 20, 1881,

I Application filed April 28, 1881. (No model.) I

To all whom it may concern Be it known that I, EDWARD D. MERRICK, of New Brighton, Beaver county, Pennsylvania, have invented an Improvement in Bakers for Grates, of which the following is a specification.

My invention relates to that class of rakers consisting of raking-teeth supported so as to pass between the grate-bars and myinvention consists in a simple and economical construction and arrangement of parts adapted to high or low-down grates, whereby the raking operations may be effectively performed without interfering with the free burning of the fuel.

In the drawings, Figure l is a sectional ele vation of a fire-place and high grate, showing my improvement. Fig.2 is a perspective view of the attachment. Fig. 3 is a sectional elevation, showing a modification. Fig. 4 is a section showing the improvement applied to a low-down grate; Fig. 5, a modification of a low-down grate; Fig. 6, a plan of the attach- I ment, Fig. 4; Fig. 7, a plan view of grate and frame, Fig. 5.

A is the back wall of the fire-place a", in which is the usual grate, either with curved basket lower bars, as in Fig. 1, or straight bars, as in Fig. 4.

At a suitable distance beyond the front bars of the grate are bearings a. for a rock shaft, B, having an angular end, and provided with a series of fingers or blades, 0, so arranged as to enter the spaces between the grate-bars, the rock-bar and its blades constituting the raker.

The blades may be connected at the outer ends by a cross-bar, d, or they may be part of a frame, as in Fig. 6, where the blades are independent of the shaft B, which is provided with arms I) I), having sockets to receive trunnions on the outer raker-blades. In either case the rocking of the bar in the bearings will be the means of carrying the blades almost vertically upward and downward between the grate-bars, thereby thoroughly agitating the fuel and discharging the dust without permitting the escape of thelarger particles, and without any tendency to push the coals either to the front or back of the grate, while, when the raking is completed, the :raker by its own weight is carried wholly away from the grate,

so as to interfere neither with the draft nor with the dumping of ashes. This avoids all liability of injuring the raker from the heat. These results are due to the placing of the bearings for the raker-shaft away from and in front of the grate, so that the blades may move nearly vertical, and so that, when lowered, they they hang altogether away from the grate.

The ditferent modes of constructingthe bearings are shown in the different views of the drawings.

In Figs. 5 and 7 the grate I has a single broad curved front bar, h, and the lower portion is flush with a frame, L, set in the tireplace level with the hearth, and has trunnions i, resting in bearings of the frame, so that by simply throwing back the upper end the contents of the grate will be dumped.

I am aware that an agitating device which could be dropped away from the grate has been made; but in that case the depth below the grate was insufficient to permit the agitator to be wholly removed from beneath the grate. In another case an agitator has been made adjustable in ways so as to be moved to and fro under the grate andso as to be wholly withdrawn from beneathit; butIdonotclaim an agitator the bearing-bar of which is horizontally adjustable.

I claim The combination, in an ordinary grate, of a raker consisting of a series of parallel blades, adapted, as described, to be passed upward between the grate-bars, and of nearly the same length as the latter, and adapted,also, to raise the body of coal. and a rock-shaft in front of and disconnected from the grate-bars, and arranged to permit the blades to be swung wholly away from under the grate, and also to be introduced between the grate-bars to rake the fire by rocking the shaft, all substantially as described.

In testimony whereofI have signed my name to this specification in the presence of two subscribing witnesses.

EDWARD D. MERRIOK.

Witnesses:

N. S. MOUONNEL, BENJ. WILDE. 

